Robert S. Billings
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Robert S. Billings,
Stephen Aaron Marcus,
R. Billings,
1983
.
Phyllis C. Panzano,
Robert S. Billings,
R. Billings,
1997
.
Thomas W. Milburn,
Robert S. Billings,
R. Billings,
1976
.
Robert S. Billings,
Garold Stasser,
G. Stasser,
1998
.
Robert S. Billings,
R. Billings,
L. Scherer,
1988
.
James A. Breaugh,
Robert S. Billings,
R. Billings,
1988
.
Robert S. Billings,
Dennis L. Warmke,
R. Billings,
1979
.
Robert S. Billings,
Mary Lou Schaalman,
1980
.
Kurt Kraiger,
Robert S. Billings,
A. Isen,
1989
.
Jinyan Fan,
Ira T. Kaplan,
Hui Meng,
2008
.
Ned A. Rosen,
Robert S. Billings,
R. Billings,
1976
.
James A. Breaugh,
Robert S. Billings,
R. Billings,
1986
.